Finding the Fourth Proportional to 113,445.58, 156,563.94 and 65,699.78

Step by Step Solution

1. Step 1: Write the proportion equation
   113,445.58 : 156,563.94 = 65,699.78 : x
2. Step 2: Convert to fraction form
   113,445.58/156,563.94 = 65,699.78/x
3. Step 3: Cross multiply
   113,445.58x = 156,563.94 × 65,699.78
4. Step 4: Simplify right side
   113,445.58x = 10,286,216,413.93
5. Step 5: Solve for x
   x = 10,286,216,413.93/113,445.58
6. Step 6: Final answer
   x = 90,670.93